* Track runes in IdentityEncoder (for subsetting), track decoded runes
* Working with the identity encoder in font_composite.go
* Add GetFilterArray to multi encoder. Add comments.
* Add NewFromContents constructor to extractor only requiring contents and resources
* golint fixes
* Optimizer compress streams - improved detection of raw streams
* Optimize - CleanContentStream optimizer that removes redundant operands
* WIP Optimize - clean fonts
Will support both font file reduction and subsetting. (WIP)
* Optimize - image processing - try combined DCT and Flate
* Update options.go
* Update optimizer.go
* Create utils.go for optimize with common methods needed for optimization
* Optimizer - add font subsetting method
Covers XObject Forms, annotaitons etc. Uses extractor package to extract text marks covering what fonts and glyphs are used. Package truetype used for subsetting.
* Add some comments
* Fix cmap parsing rune conversion
* Error checking for extractor. Add some comments.
* Update Jenkinsfile
* Update modules
* Fixed filename:page in logging
* Got CMap working for multi-rune entries
* Treat CMap entries as strings instead of runes to handle multi-byte encodings.
* Added a test for multibyte encoding.
* Changed rune->CharCode maps to string->CharCode.
* Removed unintentional changes.
* Updated comments to match new function definitions.
* Changed some []rune APIs to string
* Fixes for reviewer comments.
* Update unitype lib which improves subsetting
* Add text extraction check to creator font subsetting example
Helps ensure ToUnicode map is set correctly.
* Clean up import
* Fix spelling
* Subsetting of TrueType CID fonts using unitype
* Simplify call to SubsetRegistered so can be done right after loading font via creator finalizer
* Add an EnableFontSubsetting function on the creator to simplify font subsetting for creator users
* Add PdfFont method for encoding runes to charcode bytes
* Add getter method for CMap nbits
* Take CMap nbits into account when encoding text
* Adapt font test cases to include text encoding testing
* Add packed predefined cmaps
* Add cmap cid range parsing
* Load base cmap for predefined cmaps
* Refactor pdfFont to Unicode methods
* Preserve CharcodeBytesToUnicode behavior
* Add support for CID-keyed Type 0 fonts
* Add method documentation for the cmap package
* Refactor and document charcode to Unicode conversion code
* Add more cmap parsing test cases
* Add more method documentation in the cmap package.
* Remove unused code from the bcmaps package
* Improve cmap test case
* Assume identity when encoder is missing on regenerating field appearance
* Add missing encoder log message
* Add inverse CMap mappings
* Add CMap encoder
* Address golint notices and small fix in the cmap package
* Keep smaller charcodes when generating cmap inverse mappings
* Update extractor test case
* Keep latest supplement charcodes/CIDs when computing inverse mappings
* Fix comment typo
